30275381 has 2 divisors, whose sum is σ = 30275382. Its totient is φ = 30275380.

The previous prime is 30275359. The next prime is 30275389. The reversal of 30275381 is 18357203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22800625 + 7474756 = 4775^2 + 2734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30275381 is a prime.

It is a super-2 number, since 2×30275381² = 1833197389390322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30275389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15137690 + 15137691.

It is an arithmetic number, because the mean of its divisors is an integer number (15137691).

Almost surely, 2^30275381 is an apocalyptic number.

It is an amenable number.

30275381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30275381 is an equidigital number, since it uses as much as digits as its factorization.

30275381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 30275381 is about 5502.3068798459. The cubic root of 30275381 is about 311.6711038034.

The spelling of 30275381 in words is "thirty million, two hundred seventy-five thousand, three hundred eighty-one".